Which of the following ecosystems has the greatest net primary productivity (NPP) per unit area?
A)desert
B)temperate deciduous forest
C)agricultural land
D)tropical rain forest
E)open oceans
Answer: D
Which of the following ecosystems has the greatest net primary productivity (NPP) per unit area?
A)desert
B)temperate deciduous forest
C)agricultural land
D)tropical rain forest
E)open oceans
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